gyroscopic run-out

Why Do Hollow Keyed Shafts Fail in Heavy Garage Doors? Reference Standard: ANSI/DASMA 102 Standard Specifications for Sectional Overhead-Type Doors & ASTM B117 Standard Practice for Operating Salt Spray (Fog) Apparatus Short Answer Garage door hollow keyed shafts fail under heavy loads due to torsional shear amplification at the keyway notch and gyroscopic run-out eccentricity … Ler mais